Chevy/GMC Squarebody Heavy-Duty Engine Crossmember (1973–1987, 1991)

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Track Bar Tabs
Frame Type
Include Motor Mounts

$399.95

Product Overview


Upgrade your Squarebody with our Heavy-Duty Engine Crossmember, designed as a full replacement for the factory crossmember on 1973–1987 Chevy/GMC K-Series trucks and through 1991 on Blazer, Jimmy, and Suburban models. Built to handle the toughest off-road abuse and modern drivetrain swaps, this crossmember adds strength, clearance, and versatility far beyond the stock design.


Key Features

  • 🔧 Complete Replacement – Includes both the crossmember and the side “triangles” your motor mounts bolt to


  • 🛠️ Heavy-Duty Construction – Built for strength and longevity compared to the thin factory piece


  • ⚙️ Drop-Out Center Section – Removable center for easy oil pan access and serviceability


  • 🔄 Dual Orientation Design


  • Run one way for extra axle clearance


  • Flip 180° for additional oil pan clearance (ideal for Duramax swaps)


  • 🏁 Track Bar Ready – Optional track bar tabs available for crossover steering conversions


  • 🛡️ Swap Friendly – Clears LS engine oil pans and even Duramax diesel swaps


Fitment & Requirements

  • Vehicles:
  • 1973–1987 Chevy/GMC K-Series 4WD trucks
  • 1973–1991 Blazer, Jimmy, and Suburban


  • Frame Options:
  • 4WD
  • 2WD frames converting to 4WD


  • GVW Options:
  • 1/2 Ton, 3/4 Ton, 1 Ton


  • Lift Requirements:
  • Factory GM 10-Bolt Axle: minimum 2.5"–3" lift
  • Dana 60 Swap: minimum 4" lift


Installation Notes

  • Engine must be lifted and supported during installation (motor mount brackets are integrated into this design)


  • Bolts into most factory rivet holes (additional holes may need to be drilled in some cases)


  • Crossmembers are made to order – please allow 1–2 weeks before shipping


Why Upgrade?


The stock Squarebody crossmember was never designed for modern off-road stress, LS/Duramax swaps, or crossover steering conversions. This heavy-duty replacement provides the strength, clearance, and serviceability needed to keep your rig reliable on the street and unstoppable on the trail.

💲 Regular Price: $399.95 USD


⚡ Optional Add-Ons:

  • Track Bar Tabs (+/- $10.00 USD depending on selection)
  • Motor Mounts available separately (+$189.00 USD For Heavy Duty Small block/Big Block or LS Mounts)